[Vue] echarts圖表 legend標示顯示數值與百分比

legend: {
          orient: 'vertical',
          right: '0',
          top: '5%',
          icon: "circle",
          textStyle: {
             fontSize: 16
          },
          itemGap: 10, //間距
          formatter: function(name) {
                    var data = option.series[0].data;
                    var tarValue;
                    var total = 0;
                    for (var i = 0, l = data.length; i < l; i++) {
                        total += data[i].value;
                        if (data[i].name === name) {
                            tarValue = data[i].value;
                        }
                    }
                    var p = ((tarValue / total) * 100).toFixed(2);
                    return name + " " + " " + tarValue + " 個"+' ('+p+'%)';
                }
        },